.force_tb (Forcibly Allow Branch Tracing)

In this article

The .force_tb command forces the processor to trace branches early in the boot process.

.force_tb

Environment

Modes

User mode, kernel mode

Targets

Live, crash dump

Platforms

All

Remarks

Typically, branch tracing is enabled after the debugger initializes the processor control block (PRCB). This initialization occurs early in the boot process.

However, if you have to use the tb (Trace to Next Branch) command before this initialization, you can use the .force_tb command to enable branch tracing earlier. Use this command carefully because it can corrupt your processor state.